How to Fix Calls Not Working issue on iPhone [Solved]

Many iPhone users have reported that they have been not able to make any calls from their iPhones recently. They are not sure of the reasons why this is causing an issue. When they tried calling someone, they get Call Failed message on their iPhone screen.

We researched a bit on this problem and came up with the reasons behind this issue. Some of them are mentioned below.

  1. Sim Card was not placed properly
  2. The user might be located in an isolated/remote region
  3. Expired mobile plan
  4. Technical internal glitch

Having these factors in mind, we have compiled a few best possible fixes in this article below which will help you in resolving this issue.

Preliminary Fixes

  1. Try restarting your iPhone so as to eliminate the chances of any software bug within the iPhone. After restarting your iPhone, check whether you are able to make any calls.
  2. Next, if you are in an isolated place where you are barely able to catch any mobile signal, you are bound to get such errors (No Service message). So move to some location where you will get a good strength mobile network.
  3. Once check whether your mobile plan has expired or not. Sometimes, if the mobile plan gets lapsed, it will not allow you to make calls.
  4. Also, ensure that your iOS is updated on your iPhone to see if this fixes the issue.


Fix 1 – Refresh the Network Signals by enabling and then disabling Airplane Mode

Step 1: Open the Settings app page on your iPhone by tapping the settings icon from the home screen.

Step 2: Once the Settings page appears, tap on the Airplane Mode option toggle button to enable it as shown in the screenshot below.


Enable Airplane Mode 11zon


Step 3: This enables the airplane mode on your iPhone which disconnects all the network signals, including cellular network, Wi-Fi, etc.

Step 4: After some time, disable it by tapping on the Airplane Mode toggle switch as shown below.


Disable Airplane Mode 11zon


Fix 2 – Check for the Carrier Settings Update

Step 1: Open the Settings app on the iPhone first.

Step 2: After it opens, scroll down and select the General option by clicking on it as shown below.


General Settings Iphone 11zon


Step 3: Once done, go to the About option at the top of the General page.


About General Settings 11zon


Step 4: Scroll down the About page to the Physical Sim section.


Physical Sim 11zon


Step 5: If there were any updates from your carrier, it will pop up a context window on the screen which asks you to install the update by clicking Update.

Step 6: Otherwise, it is indicated that the carrier settings are up-to-date on your iPhone.


Fix 3 – Verify if the IMEI number is Blacklisted

Step 1: To get the IMEI number, you have to open the Phone app on your iPhone first.

Step 2: After the Phone app opens, select the Keypad tab at the bottom of the Phone app.


Keypad Phone App 11zon


Step 3: Now press *#06# and it will automatically start finding the device info.

Step 4: After a few seconds, it will display the Device Info on your iPhone screen.

Step 5: You have to copy the IMEI and IMEI 2 numbers from the Device Info page as shown below.


Device Info Iphone 11zon


Step 6: Then open a web browser like Chrome, Safari, etc on your iPhone.

Step 7: In a new tab, go to the below-given link on the web browser app.


Step 8: Once the webpage appears, type the IMEI number in the textbox field as shown below.

Step 9: Then check the I am not a robot checkbox to continue.

Step 10: Finally, click the Check button as shown below.


Imeipro Website Check 11zon


Step 11: This will start checking whether your iPhone is banned or blacklisted or not and displays it below.


Iphone Imei Blacklist Or Not 11zon


Step 12: If you find it blacklisted, please contact Apple support and get it right.

Fix 4 – Eject the SIM card and insert it back after placing it correctly

Step 1: First of all, you need to insert a pointed pin into the SIM card holder on the side of the iPhone.

Step 2: This ejects the Sim Card holder from the iPhone.

Step 3: After it ejects, pull out the sim card holder and remove the sim card.

Step 4: Now wipe the sim card with a clean cloth to remove any dirt particles accumulated around it.

Step 5: After making sure the sim card is clean, place it back into the holder and insert it into your iPhone.